import Vue from 'vue'
import VueRouter from 'vue-router'
import login from '../components/login.vue'
import home from '../components/home.vue'
import Welcome from '../components/Welcome.vue'
import user from '../components/User/user.vue'
Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/Login', component: login },
    {
      path: '/home',
      component: home,
      children: [
        {
          path: '/welcome',
          redirect: '/welcome',
          component: Welcome
        },
        {
          path: '/users',
          component: user
        }
      ]
    }
  ]
})

// 挂载路由导航首位
router.beforeEach((to, from, next) => {
  // to将要访问的路径
  // Form代表从哪个路径跳转
  // next放行，next（'/login'）强制跳转
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})
export default router
